Enrol a HubSpot list in a Drip campaign without opt-outs

**Objective:** Subscribe the members of the HubSpot contact list `{list-name}` to the Drip email series campaign named like `{campaign-name}`, after the user confirms. Never subscribe anyone who has opted out in either system.

**Step 1: Resolve the Drip campaign**

Call `drip-get-campaign` with `name.contains` set to `{campaign-name}`. Exactly one campaign must match; if none or several match, list them and stop. Keep its campaign-id and status.

**Step 2: List members in HubSpot**

Call `hubspot-get-contact-list-membership` with `list-name` set to `{list-name}` and `max-records` 200. Drop members with no contact-email.

**Step 3: Screen each member**

For each email:

* call `hubspot-get-contact-subscriptions` with `recipient-email` set to it; exclude the person if any subscription status is not subscribed (NOT_SUBSCRIBED or equivalent);
* call `drip-get-subscriber` with `email` set to it; exclude the person if Drip status is unsubscribed;
* call `drip-get-campaign-subscriber` with `email` set to it and `campaign-id` set to the campaign-id; mark the person as already in the campaign if anything comes back.

**Step 4: Confirm**

Show the campaign name and status, then four groups: will subscribe, already in campaign, excluded (opted out, with which system), no email. Ask the user to confirm the "will subscribe" group. Do nothing more until they confirm.

**Step 5: Subscribe**

Only after confirmation, call `drip-add-subscriber-to-campaign` once per confirmed person, with `email` set to their email and `campaign_id` set to the campaign-id. Report each result, then the totals: subscribed, failed (with the error).

**Rules & Guidelines:**

* `drip-get-campaign`, `drip-get-subscriber`, `drip-get-campaign-subscriber` and `drip-add-subscriber-to-campaign` are on the drip server; `hubspot-get-contact-list-membership` and `hubspot-get-contact-subscriptions` are on the hubspot server.
* `drip-add-subscriber-to-campaign` is the only write tool this prompt may call, and only after the user confirms. Do NOT call `drip-activate-campaign`, `drip-add-subscriber`, `drip-update-subscriber` or any HubSpot add or update tool.
* If the campaign is not active, say that subscribed people will not receive mail until it is activated, and leave activating it to the user.

**Validation:**

* If the list has no members, or everyone is excluded or already subscribed, report that and stop without asking for confirmation.
* If one subscribe call fails, report it and continue with the rest.